try this . You check out value in StringBuffer object as soon as u create it
i mean here
StringBuffer query_buffer = new StringBuffer();
---->here check value
query_buffer.append("WS2_COMPONENTS_PARTNO like '%
gc%'");
Iam sure u will see object is empty.There might be another problem
------------- Original Message --------------
Maya Vayner <[EMAIL PROTECTED]> wrote:
To:[EMAIL PROTECTED]
From:Maya Vayner <[EMAIL PROTECTED]>
Date:Tue, 31 Jul 2001 10:37:24 -0700
Subject: Re: local String during the same session
Here we go:
This is a call from servlet:
String = CLASS.MY_METHOD(category_name, pricel, priceh,
vendor_name, valuel, valueh, search);
The long list of parameteres passed are the search
boundaries for query to be built from.
This is the code in
MY_METHOD(category_name, pricel, priceh, vendor_name,
valuel, valueh, search):
{
.....
String result = new String();
String query_string = new String();
.....
StringBuffer query_buffer = new StringBuffer();
query_buffer.append("WS2_COMPONENTS_PARTNO like '%
gc%'");
if(isUsed(category_name))
{
query_buffer.append(" AND
WS2_COMPONENTS_LINK_C="+category_id);
}
if(isUsed(pricel) && isUsed(priceh))
{
query_buffer.append(" AND
WS2_COMPONENTS_PRICE > '"+pricel+"' AND
WS2_COMPONENTS_PRICE < '"+priceh+"'");
}
if(isUsed(vendor_name))
{
query_buffer.append(" AND
WS2_COMPONENTS_VENDOR_NM = '"+vendor_name+"'");
}
if(isUsed(search))
{
query_buffer.append(" AND
WS2_COMPONENTS_DESCRIPTION like '%"+search+"%'");
}
if(isUsed(valuel) && isUsed(valueh))
{
query_buffer.append(" AND
WS2_COMPONENTS_SIZE_1 > '"+valuel+"' AND
WS2_COMPONENTS_SIZE_1 < '"+valueh+"'");
}
query_string = query_buffer.toString();
// just to make sure
//it doesn't contain anything anymore:
query_buffer.delete(0, query_buffer.length());
....
while (something is true)
{
//here I am using that query_string
//to retrieve data from db
}
query_string = null;
//setting it to null at the end of method
//- doesn't really help
return result;
}
Maya
--- "Matthew L. Penner" <[EMAIL PROTECTED]> wrote:
> Can you post the code segment? that often helps for
> the users on this list
> to diagnose your problem.
>
> ~Matt
>
>
> On Tue, 31 Jul 2001, Maya Vayner wrote:
>
> > Hi All:
> > I am writing here for the first time, sorry if this
> > problem is difficult to understand. Ask me if
> > something/all is not clear.
> > This is a Jakarta Tomcat question:
> > Does anybody have an idea why a local variable,
> which
> > is initialized and processed in a class method,
> keeps
> > itself in the memory, i.e. it is a query_string
> which
> > is getting built each time a new request is
> processed.
> > The class method is called by the servlet to return
> > some data from database. The string is created in
> the
> > class method, and at the end I set it equal to
> null.
> > But nothing seems to work :(
> > Thanks.
> > Maya Vayner
> >
> >
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